EML PolyBox
Synthesizer by Electronic Music Laboratories
Electronic Music Laboratories produced the PolyBox from 1977 to 1984 as a small module that added polyphony to monophonic synthesizers, using phase-lock-loop circuitry to follow an incoming audio signal and generate two banks of 13 chromatic pitch sources. Only around 130 units were manufactured at an original price of , making it one of the rarest EML products.
Specifications
| Keyboard | 13 keys |
| Notes | Only ~150 units produced |
| Type | Polyphony converter module |
